Improve commit messages

[rafguns]

Because so many journal records change (mainly because of added articles) and csv-diff lists each of them, it seems like commit messages can become close to 500KB, which seems excessive.

[rafguns]

The proper way to fix this is probably within csv-diff itself, e.g. by adding an option to generate shorter commit messages and/or ignore certain columns. For now, I am thinking of applying a hacky workaround and just using the title.

[rafguns]

Hacky workaround is in place now. This works but I still think it would be nice if we could ignore certain columns, like Number of Article records and Most recent Article Added. That alone would both trim down the size of the diff and the full commit message.